Patents by Inventor Johan Christian Marinus Bras

Johan Christian Marinus Bras has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5822861
    Abstract: The invention relates to a method of manufacturing a roller bearing comprising a cage made from a thermoplastic polymer-containing material. By cross-linking the polymeric material its properties, such as form retention and compatibility with lubricants, are improved. A roller bearing provided with a cage made from suitably cross-linked thermoplastic polymer-containing material can be used even at temperatures above the melting point of the polymer. According to the invention a roller bearing is manufactured by forming a cage from thermoplastic polymer-containing material, providing it with rotating bodies and only then cross-linking the material. This avoids damage to an otherwise already rigid cage during the insertion of the rotating bodies.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: October 20, 1998
    Assignee: SKF Industrial Trading & Development Company B.V.
    Inventors: Vendran Andelo Tadic, Johan Christian Marinus Bras, Leslie Berryman
  • Patent number: 5649772
    Abstract: A rolling bearing comprises an inner race and an outer race which together enclose a bearing space in which rolling elements are accommodated, which bearing space is sealed off by means of seals fixed on the outer race. In order to prevent oil leakage, provision is made for the fastening between each seal and the outer race to be liquid-tight. The outer race can comprise at least one groove in which a seal is accommodated, while an elastic shut-off element can be provided, which shut-off element is accommodated in the groove.
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: July 22, 1997
    Assignee: SKF Industrial Trading & Development Company, B.V.
    Inventors: Armin Schlereth, Johan Christian Marinus Bras, Jan Greving